Energy Citations Database

Bibliographic Citation

 
Document
For copies of Journal Articles, please contact the Publisher or your local public or university library and refer to the information in the Resource Relation field.
For copies of other documents, please see the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or Document Availability.
Title System for logging highly deviated earth boreholes utilizing auxiliary sinker bar assembly
Creator/Author Youmans, A.H.
Publication Date1977 Dec 20
OSTI IdentifierOSTI ID: 6480354
Report Number(s)US 4063592
Resource TypePatent
Resource RelationPat. File: Filed date 29 Sep 1976
Subject440400 -- Well Logging Instrumentation ;020200 -- Petroleum-- Reserves, Geology, & Exploration ;030200 -- Natural Gas-- Reserves, Geology, & Exploration; ;WELL LOGGING-- CABLES; BOREHOLES;CONTROL;DESIGN;OPERATION;SHOCK ABSORBERS
Related SubjectCAVITIES
Description/Abstract A conventional logging instrument is adapted to traverse a slanted or deviated earth borehole.^A heavy, streamlined sinker bar is adapted to be fitted over the cable and to slide freely.^Upper and lower stop clamps, separated by approximately 100 feet of cable, are provided on the cable with the lower stop clamp being located approximately 200 feet above the logging instrument.^The sinker bar is adapted to slide freely between the upper and lower stop clamps.^It is unlikely that the logging tool and the sinker bar will become stuck at the same time in a highly deviated borehole.^If the sinker bar becomes stuck, the cable passes freely through te center of the sinker bar without impeding the logging tool until the upper clamp reaches the limit of its travel.^If at that point the logging instrument is descending freely, it can dislodge the sinker bar with a gravitational force.^If the logging instrument becomes stuck while the sinker bar is free, the sinker bar will rest on the lower clamp and push on the logging cable to impel it downward.^By the action of the sinker bar and logging tool, the probability of reaching greater depths within the deviated borehole is increased.^A spring or other such chock absorber is affixed to each of the clamps to prevent transfer of excessive inertial force during the operation of the system.
Country of PublicationUnited States
LanguageEnglish
FormatPages: 6
RightsDresser Industries, Inc.
System Entry Date2001 May 13

Top